The National Geographic's Fifty Years of Exploration beautifully charts the paths taken by astronauts on historic missions to space—including both failed and triumphant attempts—visually pinpointing specific interests in various planets and comets.

Also noted, the current positions held by spacecrafts like the Pioneer10 and robotic probes such as Voyager 1, along with current expeditions including the New Horizons mission to Pluto and the Messenger mission to Mercury, lend a sense of how far we reach these days.